High level loading of borate into lignocellulosic-based composit

Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Nonwoven fabric – Including a wood containing layer

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106 183, 264109, 428511, 4285371, 442417, C09K 318

Patent

active

057633380

ABSTRACT:
Although borates have been recognized as desirable for use in wood-based articles because of their preservative properties and low toxicity, it has not until now been possible to make effective use of them. A lignocellulosic e.g. wood-based composite article in accordance with the present Invention includes a low solubility borate compound which is mixed with the lignocellulosic furnish, resin adhesive, and a flow agent, the resultant mixture being pressed into a mat and cured. The low solubility borate can be used in a quantity from about 1% to 10% by weight of the furnish. Suitable flow agents are polyethylene glycol and glycerol in the amount of 0.4% to about 4% by weight of the furnish.

REFERENCES:
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Laks, P.E. and R.D. Palardy. 1990. The development of borate-containing flakeboard. In: Proc. 47355, First Inter. Conf. on Wood Protection with Diffusable Preservatives. Forest Prod. Res. Soc., Madison, Wis.
Knudson, R.M. 1990. Commercial development of borax-treated wood composites. In: Proc. 47355, First Inter. Conf. on Wood Protection with Diffusable Preservatives. Forest. Prod. Res. Soc., Madison, Wis.
Hsu, E. and F. Praff. 1992. Methods of making PF-bonded waferboard containing water soluble borates and boric acid. Presented at: Adhesive Technology for Tropical Woods Symposium, Taipei, Taiwan.
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Schmidt, E.L., H.J. Hall, R.O. Gertjejansen, C.G. Carll and R.C. DeGroot. 1983. Biodeterioration and strength reductions in preservative treated aspen waferboard. Forest Prod. J. 33 (11/12): 45-53.
Laks, P.E. and M.J. Manning. Inorganic borates as preservative systems for wood composites. Michigan Technological University, Houghton, Michigan, U.S. Borax, Valencia, California.
Yao, Y., M. Yoshioka and N. Shiraishi. 1995. Rigid Polyurethane foams from combined liquefication mixtures of wood and starch.

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